1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
VLD [36.1K]
3 years ago
5

If y = 2x2 – 4x, what is the value of y when x equals 5. A.10 B.30 C.80 D.480

Mathematics
1 answer:
Ainat [17]3 years ago
6 0

Answer:

The value of y in the given equation is B. 30.

Step-by-step explanation:

y = 2x² - 4x             x = 5

y = 2(5)² - 4(5)        Plug 5 in for x

y = 2(25) - 20         Square 5 and multiply 4 by 5

y = 50 - 20             Multiply 2 by 25

y = 30

Hope this helps,

❤<em>A.W.E.</em><u><em>S.W.A.N.</em></u>❤

You might be interested in
Ramos went to a pizza shop and spent half of his money on lunch. If Ramos had $4.50 left after lunch,how much money did he have
ankoles [38]
Because Ramos spent half of his money, he now has the other half of his money, which is $4.50. Therefore, he originally had:
$4.50* 2= $9.00

The final answer is $9.00~
8 0
4 years ago
Read 2 more answers
Find all factors of 2x^3-3x^2-2x
Nesterboy [21]

ANSWER:

x, 2x + 1, x -2

STEP-BY-STEP EXPLANATION:

We have the following expression:

2x^3-3x^2-2x

We simplify as follows to determine the factors:

\begin{gathered} \text{ We factor the common term:} \\  \\ x\left(2x^2-3x-2\right) \\  \\ \text{ Now we factor the following term} \\  \\ 2x^2-3x-2 \\  \\ -3x=x-4x \\  \\ 2x^2+x-4x-2 \\  \\ \left(2x^2+x\right)+\left(-4x-2\right) \\  \\ x\left(2x+1\right)-2\left(2x+1\right) \\  \\ \left(2x+1\right)\left(x-2\right) \\  \\ \text{ Therefore:} \\  \\ 2x^3-3x^2-2x=x\left(2x+1\right)\left(x-2\right) \end{gathered}

The factors would be x, 2x + 1, x -2

7 0
1 year ago
Simplify the expression.20 • 5–2
DochEvi [55]
Hello!

Simplifying an expression is putting in its simplest form.

You do 20 * 5 = 100

Then 100 - 2 = 98

The simplest form of the expression is 98

The answer is 98

Hope this helps!
5 0
4 years ago
Read 2 more answers
For what value(s) of k will the relation not be a function
skelet666 [1.2K]

We are given two relations

(a)

Relation (R)

R=[((k-8.3+2.4k),-5),(-\frac{3}{4}k,4)]

We know that

any relation can not be function when their inputs are same

so, we can set both x-values equal

and then we can solve for k

k-8.3+2.4k=-\frac{3}{4} k

3.4k-8.3=-\frac{3}{4}k

3.4k\cdot \:10-8.3\cdot \:10=-\frac{3}{4}k\cdot \:10

4k-83=-\frac{15}{2}k

34k=-\frac{15}{2}k+83

\frac{83}{2}k=83

83k=166

k=2............Answer

(b)

S = {(2−|k+1| , 4), (−6, 7)}

We know that

any relation can not be function when their inputs are same

so, we can set both x-values equal

and then we can solve for k

2-|k+1|=-6

2-\left|k+1\right|-2=-6-2

-\left|k+1\right|=-8

\left|k+1\right|=8

Since, this is absolute function

so, we can break it into two parts

|f\left(k\right)|=a\quad \Rightarrow \:f\left(k\right)=-a\quad \mathrm{or}\quad \:f\left(k\right)=a

k+1=-8\quad \quad \mathrm{or}\quad \:\quad \:k+1=8

we get

k+1=-8\quad

k=-9

k+1=8\quad

k=7

so,

k=-9\quad \mathrm{or}\quad \:k=7...............Answer

5 0
3 years ago
Amaya used these steps to solve the equation 8x+4=9+4(2x−1). Which choice describes the meaning of her result, 4=5?
GREYUIT [131]

Answer:

no values of x make the equation true

Step-by-step explanation:

Given that her work is correct, then the final step gives

4 = 5 ← meaningless

This indicates that the equation has no solution

5 0
4 years ago
Read 2 more answers
Other questions:
  • Can some one answer 7 and more if you want to
    11·1 answer
  • The process of finding such equations to describe​ real-world phenomena is called mathematical​ _______. Such​ equations, togeth
    6·1 answer
  • Ms.Phillips ordered 56 pizzas for a school fundraiser. Of the pizzas ordered, 2/7 of them were pepperoni, 19 were cheese, and th
    7·2 answers
  • helphelphelp helphelphelp helphelphelp helphelphelp helphelphelp helphelphelp helphelphelp helphelphelp helphelphelp helphelphel
    15·2 answers
  • Round 649,418 to the nearest hundred
    10·2 answers
  • This is the question
    6·2 answers
  • Draw a plane, showing the three (non-linear) points that define it.​
    9·1 answer
  • Which of these is a ratio equivalent to 3/2? A. 6/4 B. 3/4 C. 5/2 D. 6/2<br> pls help :')
    5·1 answer
  • Simplify. Write the answer using scientific notation.
    15·1 answer
  • What is the answer to this division equation?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!